Rolling-mill.



1E. FAWELL.

ROLLING MILL. APPLICATION FILED JAN. 30,1915- RENEWED MAY 29,1916.

1,192,813. Patented July 25,1916.

FIG].

a" 7 Z I 42/ l m 47 M/ 42 55 24 46 50 INVENTOR J. E. FAWELL.

ROLLING MILL.

APPLICATION FILED JAN-30,1915. RENEWED MAY 29,1916.

Patented July 25, 1916. 3'SHEETS-SHEET 2 INVENTOR m: NORRIS nzrsn: no" Momumm. WASHING run, a c

.ably mounted on the bed of the mill.

JOSEPH E. FAWELL, OF PITTSBURGH, PENNSYLVANIA.

ROLLING-MILL.

Specification of Letters Patent.

Fatented July 25, 1916.

Application filed January 30, 1915, Serial No. 5,315. Renewed May 29, 1916. Serial No. 100,704.

cal plane to and from operative position relative to a common line of feed, one pair of rolls being rotated in a direction opposite the direction of rotation of the other pair.

The invention described herein relates especially to that form in which the housings carrying the pairs of rolls are rocked back and forth in suitable supports to bring the pairs of rolls alternately to operative position.

The invention is hereinafter more fully described and claimed.

In the accompanying drawings forming a part of this specification, Figuregl is a sectional elevation of a rolhng mlll embodying my improvements; Fig. 2 is a side elevation of the mill; Fig. 3 is a sectional elevation on a plane indicated by the line IIIIII Fig. 2, and Fig. 4 is a sectional plan on a plane indicated by the line IVIV Fig. 1.

In the practice of my invention the lower ends of the housings 4 are formed on the arcs of circles and rest upon rollers 42 e two sides of the housings are drawn against opposite ends of spacing blocks 43 and 44 by the through bolts or tie-rods 45. The lower block 44 has formed thereon a lug 46 to which are secured the inner ends of rods or pitmen 47 .and 48 as shown in Figs. 1, 3 and 4. The outer ends of the pitmen are secured to cross-heads 49 and 50 carried by the rams or pistons 51 and 52 of fluid pressure cylinders 53 and '54 oppositely arranged on the bed plate of the mill. By the admission of fluid pressure into these cylinders alternately, tension Will be applied to the rods or pitmen 47 and 48 to rock the housing first in one direction and then in the opposite direction. The respective oscillations of the housings are limited by means of Stops 55 and 56 carried by the housings encountering abutments 57 and 58 on the bed: of the m1ll. The stops may be constructed and arranged in any suitable manner, but are preferably formed by lateral extensions of the lower spacing block 44 to which the pull rods or pitmen 47 and 48 are connected as shown in Fig. 1.

As the weight of the housings and rolls is considerable and they would require con siderable momentum when being shifted, suitable means should be employed to gradually reduce the rate of movement as the stops approach the abutments. Any form of elastic cushion may be employed as for example in the construction shown, cylinders 59 and 60 having their inner ends closed are so arranged on the bed of the mill that their pistons 61 can be connected to the cross-heads '49 and 50 as shown in Fig. 4. When fluid pressure is admitted into the cylinders 53 to shift the housings, the crosshead 50 will be drawn to the left forcing the pistons 61 into the cylinders v60 compressing the air contained therein. In order that these cushioning devices may not interfere materially with the movement of the housings/until near the end of their movement, a series of outlet ports 62 are so formed in the cylinders as to be progressively closed by the pistons as they move inwardly. As the last of these ports will be closed before the housings have reached the end of their movement a valved outlet is provided to control the finalrate of movement of the housings. As it is desirable that the resistance of both cushioning cylinders should be equal, their inner ends are connected by pipes 63 which are provided with outlet valves 64. By proper adjustment of these valves, the contact of the stops with the .abutments will be attended with very little shock or jar.

In Fig. 1, the stop 56 is in engagement with the abutment 58, so that by 1naintaining pressure in the shifting cylinder 54, the housing will be held firmly in the position shown in Fig. 1. A similar locking of the housing on the opposite position will be effected by maintaining pressure in the cylinder 53 after the housing has been shifted. Thus by the conjoint action of the stops, abutments and shifting cylinders, the housings are rigidly secured to the mill bed, when the mill is in operation and subjected to strains tending to unseat the housings. While it is probable that the weight of the housings and rolls will be amply suflicient to prevent any unseating of the housing while being shifted, retaining lugs 65 may be so secured to the mill bed as to engage flanges 66 on the housings as shown in Fig. 3.

Suitable means should be employed to support the housings laterally, and while not necessary, it is preferred that these lateral supports should be of a character that will not prevent the free movement of the housings and will not be liable to injury by scale, etc. In the construction shown these supports consist of rollers 68 so secured in the mill bed as to bear on curved surfaces 67 on the housings as shown in Figs. 2 and 3. The housings are provided with windows for the reception of the boxes or bearing blocks for the journals of the rolls. These windows are closed at their tops, by removable caps 69 through which pass the screws 7 0 for adjusting the upper rolls. The upper rolls are yieldingly held against the screws by springs 71 surrounding the upper ends of rods 72 which are connected to the saddles 7 3 carrying the journals of the lower rolls.

The windows in the housings are arranged at such an angle one to the other, that when one pair of rolls as c-cZ arein operative position as shown in Fig. 1, an article passing through between these rolls will pass over and preferably in contact with the roll a of the other pair, so that this roll, which rotates reversely to the roll 0, will act in conjunction with the feed rollers 7a to carry the article along. Fore-plates 7 57 6 are so secured to the housings as to bridge the spaces between the respective pairs of rolls and the inner ends of the feed tables which are provided with reversible feed rollers 7 1. In order to carry the article from the top rolls, when the latter are operating to feed, to the inner end of the receiving table bridge pieces 77 are secured to the housings, said bridge pieces being adapted to operate as strippers to prevent a piece from being caught in grooves in the upper roll.

It is the general practice to employ strippers in connection with grooved rolls to prevent the entering end of an article being carrled around the lower roll and snnllar means are employed in my improved mill. These strippers 7 S and 79 are preferably made integral one with the other and are so constructed as not only to serve as strippers but also to support the article intermediate the reducing pair of rolls and the top roll of the other pair.

WVhile the rolls may be driven by an arrangement of pinions similar to that shown and described in Letters Patent No. 1,131,601 hereinbefore referred to, any other construction or arrangement of pinions may be employed to operate the rolls.

I claim herein as my invention:-

1. In a rolling mill, the combination of housings having their lower ends formed on arcs of circles, suitably spaced rollers forming supports for said housings, fluid pressure motors having their rams or pistons connected to said housings and stops for limiting the movements of the housings, and two pairs of reducing rolls carried by said housings and adapted to be brought to working position alternately.

2. In a rolling mill, the combination of rotatably mounted housings, two sets of rolls carried by said housings, said sets of rolls being rotatable in opposite directions respectively, means for rotating said housings, and strippers for the lower rolls of each pair.

3. In a rolling mill, the combination of rotatably supported housings, two sets of rolls arranged in the housings in such angular relation one to the other that when one set of rolls is in working position the upper roll of the other set will be tangential or approximately tangential to a plane passing between the rolls of the working pair, said sets of rolls being rotatable in opposite directions, respectively, means for shifting said housings to bring the respective sets or pairs of rolls to working position and strippers arranged in the rear of all the rolls.

In testimony whereof, I have hereunto set my hand.

JOSEPH E. FAWELL.

Witnesses:

Amen A. TRILL, Tnos. B. J OYCE.

Copies of this patent may be obtained for five cents each, by addressing" the Gommissioner of Patents, Washington, D. G. 

